Physics unit 1- energy transferred by heating
- Created by: safia rassool
- Created on: 23-05-16 13:11
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- Infrared waves are part of the elctromagnetic spectrum
- part of the spectrum just beyond red visible light
- can be detected by our skin because it makes us feel warm- the sun gives off infrared radiation and it gets to us because it can travel through a vacuum (space) so doesnt involve particles
- ALL objects emit infrared radiation
- DARK MATT SURFACES- good absorber and emitter of radiation- they transfer and cool down quicker
- LIGHT SHINY SURFACES- good relector of radiation
- three states of matter- SOLID, LIQUID, GAS
- we can turn a solid into a liquid by melting it
- we can turn a liquid into a gas by evaporating it
- we can turn a liquid into a solid by freezing it
- we can turn a gas into a liquid by condensing it
- we can turn a gas into a solid AND VISE VERSA by sumblimation
- SOLID- particles in fixed pattern, touching other particles and do not move- only vibrate
- LIQUID- particles touch one another, can move and flow
- GAS- particles far apart, fast and randombly moving
- conduction- transfer of energy from particle to particle
- metals are good conductors due to free electrons gaining kinetic energt and transferring energy by collisions
- poor conductors=insulators e.g. wool
- insulators trap air
- convection- the circulation of a fluid (liquid or gas) caused by…
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